for item in root.findall(".//item"): title = item.find("title") if title is not None and title.text: title.text = html.unescape(title.text) # re-serialize sys.stdout.buffer.write(ET.tostring(root, encoding="utf-8", xml_declaration=True))

#!/usr/bin/env python3

import html
import sys
import xml.etree.ElementTree as ET

text_input = sys.stdin.read()
root = ET.fromstring(text_input)

# RSS 2.0: <channel><item><title>
for item in root.findall(".//item"):
    title = item.find("title")
    if title is not None and title.text:
        title.text = html.unescape(title.text)

# re-serialize
sys.stdout.buffer.write(ET.tostring(root, encoding="utf-8", xml_declaration=True))